To expand - most kid shows that adults can stand to watch are written to adults in some sly way that flies over the kids' heads. Often that adult targeted humor is something that kids have no context for (subtle sexual innuendo, pop culture references) - I think the 2016 "The Jungle Book" remake is a good example of this, with extended and funny references to Apocalypse Now and other mature films. But Bluey will have some innocuous fun episode and the subtle context is actually something about death, parental legacy, being an adult with a life predating your children, the pain of miscarriage, etc. I don't know how they pull off addressing those topics but they somehow do and it's magical.